import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/CookieDemo2")
public class CookieDemo2 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取Cookie信息
        Cookie[] cs=req.getCookies();
        //获取数据,遍历Cookie
        if (cs != null) {
            for (Cookie c:cs) {
                String name = c.getName();
                String value = c.getValue();
                System.out.println(name+":"+value);
            }
        }
    }
}